Correct Answer: D

Rationale: Coryza, also known as the common cold, primarily affects the upper respiratory tract and is not typically associated with lower respiratory tract infections. Pneumonia, asthma, and bronchiolitis are conditions that can manifest as lower respiratory tract infections.

Correct Answer: A

Rationale: Status asthmaticus is a life-threatening condition characterized by a severe and prolonged asthma attack that does not respond to standard treatments. It requires immediate medical intervention to prevent respiratory failure and potential fatality. Reactive airway disease, intrinsic asthma, and extrinsic asthma do not specifically denote the severity and unresponsiveness to treatment seen in status asthmaticus.

Correct Answer: B

Rationale: In a toddler presenting with sudden hoarseness, holding or pointing to their neck, and continuous cough, the nurse should be particularly concerned about respiratory tract obstruction caused by a foreign body. These symptoms are indicative of a possible foreign body in the airway, which can lead to serious complications and requires immediate attention to ensure the toddler's airway remains patent and unobstructed.

Correct Answer: A

Rationale: Hormones play a crucial role in various bodily functions such as regulating metabolism, growth, and maintaining homeostasis. However, producing new offspring involves reproductive processes controlled by other systems in the body, not directly by hormones.

Correct Answer: D

Rationale: Diabetic ketoacidosis (DKA) results from the excessive accumulation of ketone bodies from fat metabolism. During DKA, there is a lack of insulin leading to the breakdown of fat stores into fatty acids and their subsequent conversion into ketone bodies. These ketone bodies accumulate in the blood, leading to metabolic acidosis and the characteristic symptoms of DKA.